# What does this error mean - Data too large, data for \[\<transport\_request\>\]

**URL:** <https://discuss.elastic.co/t/what-does-this-error-mean-data-too-large-data-for-transport-request/209345>\
**Category:** Elasticsearch\
**Created:** [November 25, 2019, 4:45pm UTC](https://discuss.elastic.co/t/what-does-this-error-mean-data-too-large-data-for-transport-request/209345 "2019-11-25T16:45:55Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Dmitry1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dmitry1/32/50610_2.png) [@Dmitry1](https://discuss.elastic.co/u/Dmitry1)\
**Post date:** [December 4, 2019, 3:37pm UTC](https://discuss.elastic.co/t/what-does-this-error-mean-data-too-large-data-for-transport-request/209345/3 "2019-12-04T15:37:08Z")

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Hello @HenningAndersen, thank you for reply, but unfortunately setting:  
InitiatingHeapOccupancyPercent=30  
ReservePercent=25

didn't help. I've also increased heap from 30G to 50G, but it doesn't help too:

> Caused by: org.elasticsearch.common.breaker.CircuitBreakingException: [parent] Data too large, data for [\<transport\_request\>] would be [53028227584/49.3gb], which is larger than the limit of [51002736640/47.5gb], real usage: [53028224688/49.3gb], new bytes reserved: [2896/2.8kb]

And I still doesn't understand what this error really mean - what is "transport\_request" ? Is it size of one request ? (unlikely) Or it is a region where all requests stored ? (but 50G is to much for this too)  
I have rather high index rate (around 100k/sec for 2 nodes)

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_[View the full topic](https://discuss.elastic.co/t/what-does-this-error-mean-data-too-large-data-for-transport-request/209345)._